Carriage shift mechanism for



1943- c. M. FRIDEN ET AL 2,331,829

CARRIAGE SHIFT MECHANISM FOR CALCULATING MACHINES Original Filed July 1, 1940 4 Sheets-Sheet 1 INVENTORS 1 CARL M. F'E/PEN HNTHONY a. MAC/1 900 @ZZW/ ATTORN EY Oct. 12; 1943. c. M. FRIDEN ET AL CARRIAGE SHIFT MECHANISM FOR CALCULATING MACHINES Original Filed July 1, 1940 4 Sheets-Sheet 2 INVENTORS CARL M. FE/DEA/ mwwalvy a. Mac/moo BY 3 2 z ATTORN EY Oct. 12, 1943.

CARRIAGE C. M. FRIDEN ET AL SHIFT MECHANISM-FOR CALCULATING MACHINES Original Filed July 1, 1940 4 Sheets-Sheet 3 INVENTORS CHRL M. FE/DEN ANTHONY EMHCHIQDO ATTORNEY Oct. 12, 1943- c. M. FRIDEN ET AL CARRIAGE SHIFT MECHANISM FOR CALCULATING MACHINES Original Filed July 1, 1940 4 Sheets-Sheet 4 QQ EN EN \Q INVENTORS CARL M. PRIDE/V ,INTHONY 5. MACH/400 BY ATTORNEY Patented Oct. 12, 1943 CARRIAGE SHIFT MECHANISM FOR CALCULATING MACHINES Carl M. Friden, Pleasanton, and Anthony B. Machado,.0akland, Calif., assignors to Friden Calculating Machine 00., Inc., a corporation of California Original application July 1, 1940, Serial No.

' 1941, Serial No. 396,307

2 Claims.

This invention relates to calculating machines, and is concerned more particularly with the provision of improved shifting means for preventing further operation of said shifting means when the carriage enters an end position.

It is a general object of the invention to provide an improved shifting mechanism for the shiftable register carriage of calculating machines.

Another object of the invention is to provide improved control means whereby the operation of the shift mechanism is interrupted when the carriage enters an end position.

Other objects and advantages of the invention will be apparent from the following description of a preferred embodiment thereof, which is illustrated in the accompanying drawings.

In the drawings:

Figure l is a side elevational view partly in section of a calculating machine embodying the invention;

Figure 2 is a fragmentary, sectional elevation illustrating certain of the shift control connections;

Figure 3 is a longitudinal sectional view showing a part of the shift control connections;

Figure 4 is a rear elevational view of the machine showing the shifting mechanism and a part of the control for interrupting operation of such mechanism as the carriage enters an end position;

Figure 4A is an enlarged detail of a portion of Figure 4;

Figure 5 is a horizontal sectional enlarged view taken in a plane indicated by the line 55 in Figure 4.

Referring to Figures 1 to 4., the calculating machine selected for illustration in connection with the invention is of the general type described in' the patent to Carl M. Friden No. 2,229,889, dated January 28-, 1941. The" machine includes a base l0 upon which side plates H and H of the frame construction are mounted within the casing l3. The frame of the machine also includes transverse brackets l6, 11', H3 and I9 which extend between the side plates U and 12 and are secured thereto in any convenient manner.

The machine includes a shiftable register carriage 2| which is mounted for end'wise sliding movement on frame brackets I6 and I!) by means of rollers 21. The register carriage 2| serves to mount the numeral wheels 23 of the revolutions counter having an actuator 24 of suitable construction associated therewith. The carriage Divided and this application June 2,

2| also mounts numeral wheels 25 of the accumulater which are suitably journaled in carriage frame 2'! and adapted for actuation through suitable plus-minus gearing 28 having a sliding driving engagement with a shaft 29. Each shaft 29 receives dilferential increments of movement in a known manner from the associated actuating cylinder 3| under control of the usual bank of numeral keys 32 associated therewith. The sign character of the registration is controlledby shifting of the plus-minus gearing 28 under the control of a strap 33 which is mounted by suitable upright arms 34 on a transverse rocka-ble shaft 36 which may be controlled in any conven-- ient manner in performing calculating operations.

The drive for the actuating cylinders 3| and for all other power-driven power operations of the machine is derived from motor 4| having its drive shaft 42 connected by gearing 43 with the driving element or ratchet 44 of a cyclically operable clutch. Ratchet 44 is journaled on driven shaft 45 which is suitably connected to drive actuating shafts 41 on which the cylinders 31 arer'nounted. The cyclic operation of the clutch is controlled by means of clutch dog 48 carriedby driven part as of the clutch and spring-urged by means of spring 5! to clutch-engaging position.

The engagement of the clutch is controlled bymeans of clutch control lever 52 pivoted at 53 on side plate l2. Control lever 52 is connected by link 54 with the pivoted lever 56 which is pivotally connected at its lower end with a second pivoted lever 51 which controls the opening and 0105- ing of motor circuit contacts 58.

Shift mcchanism.-1\leansare provided for shifting the carriage selectively in either direction for one or more ordinal steps of movement, and the shifting means is preferably operated from the actuating shafts 41 and the cyclicallyoperable clutch under the control of a pair of manually depressiole, freely retractable shift keys which control shifting of the carriage for one or more steps of movement in accordance with the length of time (the number of machine cycles) which they are maintained depressed.

Referring to Figures 1 and 2, the shift control keys are indicated at 10 and II and are mounted for vertical sliding movement on side plates I 2 by suitable pin and slot connections. Suitable spring means (not shown) may be provided for maintaining keys l0 and Him their raised positions as shown in Figure 1. As seen in Figure 1, each key Ill and H is provided with a pin 12 which projects to either side of the key. One end of each pin 12 cooperates with a suitable cam surface on a claw arm 13 secured to lever 56 for rocking movementtherewith. Therefore, upon depression of either shift key 10 and H, levers 56 and 51 are rocked to engage the clutch and close the motor circuit contacts 58.

Prior to the engagement of the clutch and closing of the motor contacts, each of keys 10 and H is operative to engage corresponding shift connections, so that selective shifting movement of the carriage 2| in either direction for one or more ordinal positions is determined by depression and release of the respective keys. As seen in Figure 2, the respective left-hand ends of pin 12 carried by the keys 10 and H are operatively related to arms 11 and 16, respectively, which are carried by sleeve 18 and shaft 19 on which sleeve 18 is pivotally mounted. As seen in Figure 2, sleeve 18 also carries a depending arm 8| having a pin 82 thereon on which a pusher link 93 is pivotally mounted. Spring 84 urges pusher link 83 in a clockwise direction to maintain its notched end 86 in operative engagement with push rod 81 which may be slidably mounted for endwise movement in the cross-brackets I8 and 88 (Figures 2 and Referring to Figure 3, shaft 19 also carries a depending arm 8Ia on which a spring-urged pusher link 83a is pivoted for engagement with a push rod 89 (Figures 3 and 5) which rod 89 is similar in all respects to push rod 81.

The respective push rods 81 and 89 upon depression of the respective keys H and serve to enable respective drive connections from the actuating shaft to a shift drive gear in a manner to be described. As seen in Figure 5, the push rods 81 and 89 are telescopically engaged within a collar 9|, the respective collars 9I being secured to respective forked arms 92 and 93. Respective springs 94 compressed between collars 9| and washers 96 on respective rods 81 and 89 to maintain each telescopic push'rod connection in extended position.

Forked arms 92 and 93 engage respective annular grooves in shiftable drive-establishing co1 lars 91 and 98, which have endwise slidable driving engagement with fixed collars 99 secured on the rearward ends of adjacent actuating shafts 41 Collars 91 and 98 (Figure 5) are provided with respective driving teeth IOI for engagement with opposed driving notches I02 in respective gear sleeves I03 and I04. Gear sleeves I03 and I04 are journaled in brackets I6 and plate I06 mounted on brackets I6 by means of suitable spacers and bolt connections I 01.

Asseen in Figures 1 and 5, gear sleeve I 03 carries gear III which meshes with wide idler gear II 2 suitably journaled on bracket I6 and plate I 06. Idler gear H2 also meshes with large gear I I3 of a double gear assembly including a small gear I I4 meshing with shift drive gear H6. The gear assembly H3 and H4 are carried by shaft H1 suitably journaled in brackets I6 and plate I06. Gear H6 is carried by shaft H8 suitably journaled in brackets I6 and in upward offset portion I06a (Figure 5) of plate I06.

- As seen in Figure 4, gear sleeve I04 carries gear I2I which meshes directly with gear H3 of the double gear assembly. The result is that gear sleeves I03 and I04, when driven, serve to drive the gear train including gears H3, H4, and H6 in opposite directions. The gearing provides a drive ratio of four to one, so that each rotation of the gear sleeve I03 or gear sleeve I04 will provide a one-quarter rotation of gear I I6.

As seen in Figures 1 and 4, shaft H8 which carries shift drive gear H6 also carries a drive plate I3I carrying four equally spaced shift drive pins I32 for engagement with notches I33 of shift rack I34 on carriage 2|. As seen in Figure 4, yieldable pawl I36 pivoted at I31 on rack I34 provides one wall of one end slot I33, so that the disc I3I upon clockwise rotation, as shown in Figure 4, will be ineffective to shift the carriage past its end position but can become effective upon counter-clockwise movement to shift the carriage from its leftmost position as viewed from the front of the machine.

The arrangement is such that depression of key 10 operates through the associated linkage to engage drive tooth IOI with its corresponding notch I02 (Figure 5) of gear sleeve I03 to effect right-hand shifting of the carriage (i. e., to the left as shown in Figure 4) by causing counterclockwise rotation of disc I3I. Correspondingly, depression of shift key 1I causes shifting of the carriage to the left as viewed from the front of the machine by engagement of drive collar 98 with gear sleeve I04 to effect counter-clockwise rotation of disc I3I as viewed in Figure 4.

Means are provided for locking the carriage in any shifted position thereof, said means being releasable upon operation of either shift key. Referring to Figure 4, the shift disc I3I carries four pins equally spaced apart for cooperation with the upper end of a pair of scissor levers I61 and I63 suitably pivoted on plate I06. Stop arms I 61 and I68 have a suitable connection for simultaneous pivoting movement in opposite directions, and are connected by spring I12. Stop arm I61 carries a depending arm I13 which lies in front of an ear I14 (Figures 4 and 5) of a link I16 pivotally connected to similar bell cranks I11. Each bell crank I11 has an arm I19 lying in front of the aligned push part 92 or 93 so that upon operation of either push rods 81 or 89 by the respective shift keys, the linkage is operated to rock the stop arms I61 and I68 to disengaged position.

The shift drive disc I 3| has centralizing means associated therewith which operate to insure accurate position of the carriage in any shifted position thereof and which are controlled to be disabled during plural cycle operation of the shifting mechanism until the carriage is in the desired shifted position. As seen in Figure 4, the shift disc I3I is provided with four equally spaced centralizing depressions I8I. Opposite depressions I8I are engaged by respective rollers I82 at the upper ends of respective centralizing bell cranks I83 and I84 pivoted on the plate I06. Spring I88 connects the bell cranks I83 and I84. 7 The lower arms of bell cranks I83 and I84 are suitably connected together so that the centralizing bell cranks move together. With the bellcranks I83 and I84 is a latch lever I94 which is urged clockwise by spring I91 to move into position to hold the bell cranks out of engagement with the shift disc I 3I To maintain the latch I94 active during plural cycle operations, the lever I94 has an arm 20I which overlies a roller 203 carried by cam follower arm 204 pivoted on plate I53 and urged in a clockwise direction by spring 201. Cam follower arm 204 is provided with a tooth 208 which is adapted in the full cycle position of the parts to seat in a notch 209 of a cam disc 2H secured on the extended end 2I2 of one of actuating shafts 41. Latch lever I94 is normally held in inactive position by the follower arm 204 when it is seated in its notch. During continuous rotation of the cam disc 2 in the plural cycle operation, the cam follower arm 204 does not have sufficient time to enter the notch 205 so that the centralizing bell cranks I83 and I84 maintain the displaced position. The above mechanism is fully described and claimed in our copending application, Serial No, 343,386.

Means are provided for disabling the control of the keys when the carriage shifts into either of its end positions, and for this purpose means is provided for lifting the respective yieldable pusher links 83 and 83a when the carriage reaches its end position. As seen in Figure 3, lever I4I pivoted at I42 has an ear I43 underlying pusher link 83a and is pivotally and slidably connected at I44 with lever I46 pivoted on shaft 36. Lever I46 carries a roller I 41 which overlies (Figure 4) an end of a lever I48 pivoted at I49 to the lower end of a lever II pivoted at I52 on a plate I 53 carried by bracket I 6. Lever I48 has a cam surface I54 normally abutting a pin I56 on plate I53. The upper arm of lever I5I carries a roller I51 which is adapted for engagement by arm I58 mounted on rack I34 when the carriage is shifted in its right end position (its leftmost position as viewed in Figure 4) to rock lever I5I in a counter-clockwise direction and thereby move lever I48 to the right as viewed in Figure 4, whereby pin I56 operates on cam surface I54 to rock lever I48 in a clockwise direction and operate the lever I46. The lever I46 is moved in a counter-clockwise direction as viewed in Figure 3 to oscillate lever MI in a clockwise direction and therefore lift pusher link 83a against the tension of its spring 84a and move it out of engagement with push 'rod 89 which is therefore retracted on the influence of this spring 94 to disengage the drive connection between collar 08 and gear sleeve I04.

As seen in Figure 2, push link 83 has associated therewith a lever I59 which may be operated in any convenient manner from pawl I36 upon the first revolution of shift disc I3I when the carriage is in its end position to disengage the drive connection IOI, I02 between collar 91 and gear sleeve I03. Thus, the drive connection from key 'II is broken the first revolution after the carriage is entering its end position, while the drive connection from shift key I0 is broken as the carriage enters its last position, so that there is no over-driving of the shift disc I3I.

We claim:

1. In a calculating machine having a shiftable carriage, means for shifting said carriage, and drive means for said shifting means including a motor and a cyclic clutch for converting the non-cyclic motor drive to a cycle drive; said shifting means including a drive element and a drive establishing connection between said clutch and said drive element, a control key for said shifting means, controlling linkages from said key to said clutch and said drive establishing connection, said linkage to said drive establishing connection including a yieldable element, and means controlled by said carriage upon shifting into an end position for moving said yieldable element to disable said drive establishing connection and terminate the drive of said shifting means with said shift key depressed and with said clutch engaged.

2. In a calculating machine having a shiftable carriage, means for shifting said carriage, and drive means for said shifting means including a motor and a cyclic clutch for converting the noncyclic motor drive to a cycle drive; said shifting means including a drive element and a drive establishing connection between said clutch'and said drive element, a control key for said shifting means, controlling linkages from said key to said clutch and said drive establishing connection, said linkage to said drive establishing connection including a control member for said connection, a pusher arm for operating said member, spring means yieldably holding said pusher arm in active position, a lever having a portion operatively related to said pusher arm for moving said pusher arm against the urgency of said spring means to an inactive position, an operating linkage for said lever having a part disposed adjacent the path of travel of said carriage, and means on said carriage for engaging said part to operate said linkage and said lever to move said pusher arm to inactive position and disable said drive establishing connection with said shift key depressed and with said clutch engaged.

CARL M. FRIDEN. ANTHONY B. MACHADO. 

